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1da177e4 LT |
1 | /* |
2 | * Compaq Hot Plug Controller Driver | |
3 | * | |
4 | * Copyright (C) 1995,2001 Compaq Computer Corporation | |
5 | * Copyright (C) 2001,2003 Greg Kroah-Hartman (greg@kroah.com) | |
6 | * Copyright (C) 2001 IBM Corp. | |
7 | * | |
8 | * All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
18 | * NON INFRINGEMENT. See the GNU General Public License for more | |
19 | * details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | * | |
25 | * Send feedback to <greg@kroah.com> | |
26 | * | |
27 | */ | |
28 | ||
1da177e4 LT |
29 | #include <linux/module.h> |
30 | #include <linux/kernel.h> | |
5a0e3ad6 | 31 | #include <linux/slab.h> |
1da177e4 LT |
32 | #include <linux/types.h> |
33 | #include <linux/proc_fs.h> | |
34 | #include <linux/workqueue.h> | |
35 | #include <linux/pci.h> | |
7a54f25c | 36 | #include <linux/pci_hotplug.h> |
613655fa | 37 | #include <linux/mutex.h> |
9f3f4681 | 38 | #include <linux/debugfs.h> |
1da177e4 LT |
39 | #include "cpqphp.h" |
40 | ||
613655fa | 41 | static DEFINE_MUTEX(cpqphp_mutex); |
9f3f4681 | 42 | static int show_ctrl (struct controller *ctrl, char *buf) |
1da177e4 | 43 | { |
9f3f4681 | 44 | char *out = buf; |
1da177e4 LT |
45 | int index; |
46 | struct pci_resource *res; | |
47 | ||
1da177e4 LT |
48 | out += sprintf(buf, "Free resources: memory\n"); |
49 | index = 11; | |
50 | res = ctrl->mem_head; | |
51 | while (res && index--) { | |
52 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
53 | res = res->next; | |
54 | } | |
55 | out += sprintf(out, "Free resources: prefetchable memory\n"); | |
56 | index = 11; | |
57 | res = ctrl->p_mem_head; | |
58 | while (res && index--) { | |
59 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
60 | res = res->next; | |
61 | } | |
62 | out += sprintf(out, "Free resources: IO\n"); | |
63 | index = 11; | |
64 | res = ctrl->io_head; | |
65 | while (res && index--) { | |
66 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
67 | res = res->next; | |
68 | } | |
69 | out += sprintf(out, "Free resources: bus numbers\n"); | |
70 | index = 11; | |
71 | res = ctrl->bus_head; | |
72 | while (res && index--) { | |
73 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
74 | res = res->next; | |
75 | } | |
76 | ||
77 | return out - buf; | |
78 | } | |
1da177e4 | 79 | |
9f3f4681 | 80 | static int show_dev (struct controller *ctrl, char *buf) |
1da177e4 | 81 | { |
3c78bc61 | 82 | char *out = buf; |
1da177e4 LT |
83 | int index; |
84 | struct pci_resource *res; | |
85 | struct pci_func *new_slot; | |
86 | struct slot *slot; | |
87 | ||
9f3f4681 | 88 | slot = ctrl->slot; |
1da177e4 LT |
89 | |
90 | while (slot) { | |
91 | new_slot = cpqhp_slot_find(slot->bus, slot->device, 0); | |
92 | if (!new_slot) | |
93 | break; | |
94 | out += sprintf(out, "assigned resources: memory\n"); | |
95 | index = 11; | |
96 | res = new_slot->mem_head; | |
97 | while (res && index--) { | |
98 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
99 | res = res->next; | |
100 | } | |
101 | out += sprintf(out, "assigned resources: prefetchable memory\n"); | |
102 | index = 11; | |
103 | res = new_slot->p_mem_head; | |
104 | while (res && index--) { | |
105 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
106 | res = res->next; | |
107 | } | |
108 | out += sprintf(out, "assigned resources: IO\n"); | |
109 | index = 11; | |
110 | res = new_slot->io_head; | |
111 | while (res && index--) { | |
112 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
113 | res = res->next; | |
114 | } | |
115 | out += sprintf(out, "assigned resources: bus numbers\n"); | |
116 | index = 11; | |
117 | res = new_slot->bus_head; | |
118 | while (res && index--) { | |
119 | out += sprintf(out, "start = %8.8x, length = %8.8x\n", res->base, res->length); | |
120 | res = res->next; | |
121 | } | |
122 | slot=slot->next; | |
123 | } | |
124 | ||
125 | return out - buf; | |
126 | } | |
1da177e4 | 127 | |
9f3f4681 | 128 | static int spew_debug_info(struct controller *ctrl, char *data, int size) |
1da177e4 | 129 | { |
9f3f4681 GKH |
130 | int used; |
131 | ||
132 | used = size - show_ctrl(ctrl, data); | |
133 | used = (size - used) - show_dev(ctrl, &data[used]); | |
134 | return used; | |
135 | } | |
136 | ||
137 | struct ctrl_dbg { | |
138 | int size; | |
139 | char *data; | |
140 | struct controller *ctrl; | |
141 | }; | |
142 | ||
143 | #define MAX_OUTPUT (4*PAGE_SIZE) | |
144 | ||
145 | static int open(struct inode *inode, struct file *file) | |
146 | { | |
8e18e294 | 147 | struct controller *ctrl = inode->i_private; |
9f3f4681 GKH |
148 | struct ctrl_dbg *dbg; |
149 | int retval = -ENOMEM; | |
150 | ||
613655fa | 151 | mutex_lock(&cpqphp_mutex); |
9f3f4681 GKH |
152 | dbg = kmalloc(sizeof(*dbg), GFP_KERNEL); |
153 | if (!dbg) | |
154 | goto exit; | |
155 | dbg->data = kmalloc(MAX_OUTPUT, GFP_KERNEL); | |
156 | if (!dbg->data) { | |
157 | kfree(dbg); | |
158 | goto exit; | |
159 | } | |
160 | dbg->size = spew_debug_info(ctrl, dbg->data, MAX_OUTPUT); | |
161 | file->private_data = dbg; | |
162 | retval = 0; | |
163 | exit: | |
613655fa | 164 | mutex_unlock(&cpqphp_mutex); |
9f3f4681 GKH |
165 | return retval; |
166 | } | |
167 | ||
168 | static loff_t lseek(struct file *file, loff_t off, int whence) | |
169 | { | |
d2c40f78 AV |
170 | struct ctrl_dbg *dbg = file->private_data; |
171 | return fixed_size_llseek(file, off, whence, dbg->size); | |
1da177e4 | 172 | } |
9f3f4681 GKH |
173 | |
174 | static ssize_t read(struct file *file, char __user *buf, | |
175 | size_t nbytes, loff_t *ppos) | |
176 | { | |
177 | struct ctrl_dbg *dbg = file->private_data; | |
178 | return simple_read_from_buffer(buf, nbytes, ppos, dbg->data, dbg->size); | |
179 | } | |
180 | ||
181 | static int release(struct inode *inode, struct file *file) | |
182 | { | |
183 | struct ctrl_dbg *dbg = file->private_data; | |
184 | ||
185 | kfree(dbg->data); | |
186 | kfree(dbg); | |
187 | return 0; | |
188 | } | |
189 | ||
d54b1fdb | 190 | static const struct file_operations debug_ops = { |
9f3f4681 GKH |
191 | .owner = THIS_MODULE, |
192 | .open = open, | |
193 | .llseek = lseek, | |
194 | .read = read, | |
195 | .release = release, | |
196 | }; | |
197 | ||
198 | static struct dentry *root; | |
199 | ||
200 | void cpqhp_initialize_debugfs(void) | |
201 | { | |
202 | if (!root) | |
203 | root = debugfs_create_dir("cpqhp", NULL); | |
204 | } | |
205 | ||
206 | void cpqhp_shutdown_debugfs(void) | |
207 | { | |
208 | debugfs_remove(root); | |
209 | } | |
210 | ||
211 | void cpqhp_create_debugfs_files(struct controller *ctrl) | |
212 | { | |
54cc6954 KS |
213 | ctrl->dentry = debugfs_create_file(dev_name(&ctrl->pci_dev->dev), |
214 | S_IRUGO, root, ctrl, &debug_ops); | |
9f3f4681 GKH |
215 | } |
216 | ||
217 | void cpqhp_remove_debugfs_files(struct controller *ctrl) | |
218 | { | |
5d37818b | 219 | debugfs_remove(ctrl->dentry); |
9f3f4681 GKH |
220 | ctrl->dentry = NULL; |
221 | } | |
222 |